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Studies of the 21 Water Resources Regions $38 million
<br />Aggregated Information Warehouse $4 million
<br />Methods Development and National Synthesis $6 million
<br />These estimates would be refined early in the pilot effort.
<br />Concluding Remarks
<br />Hydrologic data and sound hydrologic analyses are fundamental to understanding the
<br />availability and use of freshwater resources. Important hydrologic aspects of water
<br />availability include the dynamic nature of water - resource systems, the need to consider
<br />the complete hydrologic system, the importance of a long -term perspective toward
<br />management of water resources, and the dependence of water availability analysis on
<br />spatial scale. These aspects underlie the design of a proposed national assessment of
<br />water availability and use, the primary goals of which are to develop and regularly report
<br />indicators of the status and trends in water availability and use across the Nation and to
<br />improve estimates of regional -scale water budgets and water -cycle components.
<br />References
<br />Cayan, D.R., Kammerdiener, S., Dettinger, M.D., Caprio, J.M., and Peterson, D.H., 2001,
<br />Changes in the onset of spring in the western United States: Bulletin, American
<br />Meteorological Society, 82, p. 399 -415.
<br />Dettinger, M.D., and Cayan, D.R., 1995, Large -scale atmospheric forcing of recent trends
<br />toward early snowmelt in California: Journal of Climate 8(3), p. 606 -623.
<br />H. John Heinz III Center for Science, Economics and the Environment, 2002, The State
<br />of the Nation's Ecosystems: Measuring the Lands, Waters, and Living Resources of the
<br />United States: Cambridge University Press, Cambridge, UK, 270 p. Available on -line at:
<br />http:/ /www heinzctr.or /g, ecosystems /report.html
<br />Hodgkins, G.A., James, I.C., and Huntington, T.G., 2003, Changes in the timing of high
<br />river flows in New England over the 20th Century: Journal of Hydrology, 278, p. 244-
<br />252.
<br />National Research Council, 2002, Estimating water use in the United States —A new
<br />paradigm for the National Water -Use Information Program: National Academy Press,
<br />Washington, D.C., 176 p.
<br />Solley, W.B., Pierce, R.R., and Perlman, H.A., 1998, Estimated water use in the United
<br />States in 1995: U.S. Geological Survey Circular 1200.
<br />Taylor, C.J., and Alley, W.M., 2001, Ground - water -level monitoring and the importance
<br />of long -term water -level data: U.S. Geological Survey Circular 1217.
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